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... Hormones are produced in the colloid when atoms of the mineral iodine attach to a glycoprotein, called thyroglobulin, that is secreted into the colloid by the follicle cells. The following steps outline the hormones’ assembly: 1. Binding of TSH to its receptors in the follicle cells of the thyroid g ...
... Hormones are produced in the colloid when atoms of the mineral iodine attach to a glycoprotein, called thyroglobulin, that is secreted into the colloid by the follicle cells. The following steps outline the hormones’ assembly: 1. Binding of TSH to its receptors in the follicle cells of the thyroid g ...
Assessment and Management of Patients with Endocrine Disorders
... swelling in the neck, referred to as a goiter. Some goiters are accompanied by hyperthyroidism, in which case they are described as toxic; others are associated with a euthyroid state and are called nontoxic goiters. ...
... swelling in the neck, referred to as a goiter. Some goiters are accompanied by hyperthyroidism, in which case they are described as toxic; others are associated with a euthyroid state and are called nontoxic goiters. ...
Waves notes section 5 - Nuclear radiation
... down. In the event of an emergency they are pushed right into the core of the reactor and the chain reaction stops completely. 4. A cooling system is needed to cool the reactor and to transfer heat to the boilers in order to generate electricity. British gascooled reactors use carbon dioxide gas as ...
... down. In the event of an emergency they are pushed right into the core of the reactor and the chain reaction stops completely. 4. A cooling system is needed to cool the reactor and to transfer heat to the boilers in order to generate electricity. British gascooled reactors use carbon dioxide gas as ...
SCIENCE 10: (7.1) ATOMIC THEORY, ISOTOPES
... REPRESENTING ISOTOPES http://www.colorado.edu/physics/2000/isotopes/index.html ...
... REPRESENTING ISOTOPES http://www.colorado.edu/physics/2000/isotopes/index.html ...
Treatment for thyroid cancer
... given a general anaesthetic and a small cut will be made across your neck. Partial or hemi-thyroidectomy – only the affected lobe or section of the thyroid is removed. Sometimes this surgery is also used to diagnose thyroid cancer if a fine needle aspiration biopsy doesn’t provide enough tissue, or ...
... given a general anaesthetic and a small cut will be made across your neck. Partial or hemi-thyroidectomy – only the affected lobe or section of the thyroid is removed. Sometimes this surgery is also used to diagnose thyroid cancer if a fine needle aspiration biopsy doesn’t provide enough tissue, or ...
Amino Acid-Derived Hormones
... Amino Acid-Derived Hormones Of the amino acid-derived hormones, some circulate for only a few minutes while others may circulate for days. The amino acid tyrosine is the precursor for two groups of hormones: the thyroid hormones, produced in the thyroid gland; and the catecholamines (epinephrine and ...
... Amino Acid-Derived Hormones Of the amino acid-derived hormones, some circulate for only a few minutes while others may circulate for days. The amino acid tyrosine is the precursor for two groups of hormones: the thyroid hormones, produced in the thyroid gland; and the catecholamines (epinephrine and ...
Flame Retardant
... ineffective. • Flame retardants are only required to show that it can stop fire after 12 seconds of burning. Should more be required? • 64% of flame retardants do not have to be labeled when used in products. ...
... ineffective. • Flame retardants are only required to show that it can stop fire after 12 seconds of burning. Should more be required? • 64% of flame retardants do not have to be labeled when used in products. ...
File
... some are beta decay - the stable end point is an element with atomic # less than 83 (lead) - there are also unstable lead isotopes which are intermediates ...
... some are beta decay - the stable end point is an element with atomic # less than 83 (lead) - there are also unstable lead isotopes which are intermediates ...
Chp 7.1 Atomic Theory and Radioactive Decay
... • Radioactivity results from having an unstable nucleus. • When these nuclei lose energy and break apart, decay occurs. • Radioactive decay releases energy from the nucleus as radiation. • Radioactive atoms release energy until they become stable, often as different atoms. • An element may have only ...
... • Radioactivity results from having an unstable nucleus. • When these nuclei lose energy and break apart, decay occurs. • Radioactive decay releases energy from the nucleus as radiation. • Radioactive atoms release energy until they become stable, often as different atoms. • An element may have only ...
Chemical Co-ordination and Endocrine Glands
... Pituitary Gland 1. STH: Controls growth of tissue, bones, metabolic process and break down of glycogen. 2. TSH: Secretion of thyroxin and intake of iodine by the ...
... Pituitary Gland 1. STH: Controls growth of tissue, bones, metabolic process and break down of glycogen. 2. TSH: Secretion of thyroxin and intake of iodine by the ...
Physical Science: Nuclear Chemistry Study Guide
... 9. In this example, what are the chemical symbols of the products of the decay? a. Ra and Rn c. Rn and He b. Ra and He d. He is the only product. 10. During beta decay, a nucleus a. gives up two protons and two neutrons. b. maintains the same number of protons and neutrons. c. loses a proton and gai ...
... 9. In this example, what are the chemical symbols of the products of the decay? a. Ra and Rn c. Rn and He b. Ra and He d. He is the only product. 10. During beta decay, a nucleus a. gives up two protons and two neutrons. b. maintains the same number of protons and neutrons. c. loses a proton and gai ...
Nuclear Chemistry I: Radioactivity Reading: Moore chapter 20
... 1.) α-radiation – positively charged particles known as helium nuclei, 24He2+; αradiation has very little penetrating power and is thus readily absorbed 2.) β-radiation – negatively charged particles – electrons, -10e (or β−), which have more penetrating power than α-particles, and are less readily ...
... 1.) α-radiation – positively charged particles known as helium nuclei, 24He2+; αradiation has very little penetrating power and is thus readily absorbed 2.) β-radiation – negatively charged particles – electrons, -10e (or β−), which have more penetrating power than α-particles, and are less readily ...
Alpha Beta Fission Fusion
... In 1902, Frederick Soddy proposed the theory that "radioactivity is the result of a natural change of an isotope of one element into an isotope of a different element." Nuclear reactions involve changes in particles in an atom's nucleus and thus cause a change in the atom itself. All elements heavie ...
... In 1902, Frederick Soddy proposed the theory that "radioactivity is the result of a natural change of an isotope of one element into an isotope of a different element." Nuclear reactions involve changes in particles in an atom's nucleus and thus cause a change in the atom itself. All elements heavie ...
Glossary of Technical Terms - Institute for Energy and Environmental
... The splitting of the nucleus of an element into fragments. Heavy elements such as uranium or plutonium release energy when fissioned. fissile material A material consisting of atoms whose nuclei can be split when irradiated with low energy (ideally, zero energy) neutrons. Well-known examples are plu ...
... The splitting of the nucleus of an element into fragments. Heavy elements such as uranium or plutonium release energy when fissioned. fissile material A material consisting of atoms whose nuclei can be split when irradiated with low energy (ideally, zero energy) neutrons. Well-known examples are plu ...
What We Treat - North Jersey Endocrine Consultants, LLC
... Osteoporosis is another common condition treated by the endocrinologists in our practice. This is a disease characterized by thinning and weakening of the bones leading to an increased risk of hip, vertebral and other fractures. There are several new therapies available for treating this condition ...
... Osteoporosis is another common condition treated by the endocrinologists in our practice. This is a disease characterized by thinning and weakening of the bones leading to an increased risk of hip, vertebral and other fractures. There are several new therapies available for treating this condition ...
experiment 8 radioactive decay of nuclei
... To study the time dependence of radioactive decay. To find half-life time for different materials. APPARATUS: Geiger-Mueller counter with computer interface, radioactive sources. THEORY: All nuclei are radioactive, and each second every nucleus has a finite probability to decay - primarily by emissi ...
... To study the time dependence of radioactive decay. To find half-life time for different materials. APPARATUS: Geiger-Mueller counter with computer interface, radioactive sources. THEORY: All nuclei are radioactive, and each second every nucleus has a finite probability to decay - primarily by emissi ...
Phys 282 EXP 8
... To study the time dependence of radioactive decay. To find half-life time for different materials. APPARATUS: Geiger-Mueller counter with computer interface, radioactive sources. ...
... To study the time dependence of radioactive decay. To find half-life time for different materials. APPARATUS: Geiger-Mueller counter with computer interface, radioactive sources. ...
Nuclear Reactions
... penetrating than Alpha particles • Can be stopped by a sheet of aluminum foil. ...
... penetrating than Alpha particles • Can be stopped by a sheet of aluminum foil. ...
Adrenal Medulla: Pheochromocytoma Scan
... • Allergy to iodine may be a consideration, although doses are small. • Patient taking interfering medications. ...
... • Allergy to iodine may be a consideration, although doses are small. • Patient taking interfering medications. ...
Endocrine System Lecture
... bb. Lack of sexual development cc. Mental development is normal (4) If diagnosed early, it can be treated with injections of somatotropic hormone for 5 or more years until long bone growth is complete D. Thyroid gland 1. Synthesizes hormones that regulate body’s metabolism and control the level of c ...
... bb. Lack of sexual development cc. Mental development is normal (4) If diagnosed early, it can be treated with injections of somatotropic hormone for 5 or more years until long bone growth is complete D. Thyroid gland 1. Synthesizes hormones that regulate body’s metabolism and control the level of c ...
Nutritional Support for the Thyroid Gland
... important because Thyroid Stimulating Hormone (TSH) stimulates all steps in the synthesis and secretion of T3 and T4. The first step is the binding of TSH hormone to TSH receptors located on the basal membrane of thyroid epithelial cells, followed by elevation of cyclic AMP levels, and a subsequent ...
... important because Thyroid Stimulating Hormone (TSH) stimulates all steps in the synthesis and secretion of T3 and T4. The first step is the binding of TSH hormone to TSH receptors located on the basal membrane of thyroid epithelial cells, followed by elevation of cyclic AMP levels, and a subsequent ...
Stable Vs Unstable Isotopes
... circulate to organ/area of interest in order to assess function. ...
... circulate to organ/area of interest in order to assess function. ...
1412-PracticeExam4
... Carbon-11 is a radioactive isotope of carbon. Its half-life is 20.3 minutes. What fraction of the initial number of carbon-11 atoms in a sample will remain after 81 minutes? ...
... Carbon-11 is a radioactive isotope of carbon. Its half-life is 20.3 minutes. What fraction of the initial number of carbon-11 atoms in a sample will remain after 81 minutes? ...
Decommissioning a nuclear reactor
... gamma-emitting radionuclides produced by activation of the construction materials of the reactor, especially the core, shielding and pressure vessels. In magnox reactors the most dominant radionuclide is typically Co-60 in the activated steelwork. Co-60 has a half life of 5.27 years, so it will deca ...
... gamma-emitting radionuclides produced by activation of the construction materials of the reactor, especially the core, shielding and pressure vessels. In magnox reactors the most dominant radionuclide is typically Co-60 in the activated steelwork. Co-60 has a half life of 5.27 years, so it will deca ...
Iodine-131
Iodine-131 (131I), also loosely and nonspecifically called radioiodine, is an important radioisotope of iodine discovered by Glenn Seaborg and John Livingood in 1938 at the University of California, Berkeley. It has a radioactive decay half-life of about eight days. It is associated with nuclear energy, medical diagnostic and treatment procedures, and natural gas production. It also plays a major role as a radioactive isotope present in nuclear fission products, and was a significant contributor to the health hazards from open-air atomic bomb testing in the 1950s, and from the Chernobyl disaster, as well as being a large fraction of the contamination hazard in the first weeks in the Fukushima nuclear crisis. This is because I-131 is a major uranium, plutonium fission product, comprising nearly 3% of the total products of fission (by weight). See fission product yield for a comparison with other radioactive fission products. I-131 is also a major fission product of uranium-233, produced from thorium.Due to its mode of beta decay, iodine-131 is notable for causing mutation and death in cells that it penetrates, and other cells up to several millimeters away. For this reason, high doses of the isotope are sometimes less dangerous than low doses, since they tend to kill thyroid tissues that would otherwise become cancerous as a result of the radiation. For example, children treated with moderate dose of I-131 for thyroid adenomas had a detectable increase in thyroid cancer, but children treated with a much higher dose did not. Likewise, most studies of very-high-dose I-131 for treatment of Graves disease have failed to find any increase in thyroid cancer, even though there is linear increase in thyroid cancer risk with I-131 absorption at moderate doses. Thus, iodine-131 is increasingly less employed in small doses in medical use (especially in children), but increasingly is used only in large and maximal treatment doses, as a way of killing targeted tissues. This is known as ""therapeutic use.""Iodine-131 can be ""seen"" by nuclear medicine imaging techniques (i.e., gamma cameras) whenever it is given for therapeutic use, since about 10% of its energy and radiation dose is via gamma radiation. However, since the other 90% of radiation (beta radiation) causes tissue damage without contributing to any ability to see or ""image"" the isotope, other less-damaging radioisotopes of iodine such as iodine-123 (see isotopes of iodine) are preferred in situations when only nuclear imaging is required. The isotope I-131 is still occasionally used for purely diagnostic (i.e., imaging) work, due to its low expense compared to other iodine radioisotopes. Very small medical imaging doses of I-131 have not shown any increase in thyroid cancer. The low-cost availability of I-131, in turn, is due to the relative ease of creating I-131 by neutron bombardment of natural tellurium in a nuclear reactor, then separating I-131 out by various simple methods (i.e., heating to drive off the volatile iodine). By contrast, other iodine radioisotopes are usually created by far more expensive techniques, starting with reactor radiation of expensive capsules of pressurized xenon gas.Iodine-131 is also one of the most commonly used gamma-emitting radioactive industrial tracer. Radioactive tracer isotopes are injected with hydraulic fracturing fluid to determine the injection profile and location of fractures created by hydraulic fracturing.Much smaller incidental doses of iodine-131 than those used in medical therapeutic procedures, are thought to be the major cause of increased thyroid cancers after accidental nuclear contamination. These cancers happen from residual tissue radiation damage caused by the I-131, and usually appear years after exposure, long after the I-131 has decayed.